KR102225761B1 - Sliding device for vehicle seats with improved rail design - Google Patents

Abstract

The present invention provides improved stability by including a pair of sliding tracks 10 each including a lower rail 20 and an upper rail 30, and a sliding effort when the upper rail slides with respect to the lower rail. It relates to a sliding device 100 for a vehicle seat to reduce the. Each upper rail is constrained to each lower rail and slides freely with respect to the lower rail, and a ball 70 is arranged between the upper rail and the lower rail, and the upper and lower rails are lower and lower at each side. It is formed to form the upper ball guide (72, 74). Due to the design of the upper and lower rails in the lower and upper ball guide portions 72 and 74, labor is reduced, stability of the rail is improved, and deformation of the rail is prevented while the rails slide relative to each other.

Description

Sliding device for vehicle seats with improved rail design

The present invention relates to a sliding device for a vehicle seat.

More specifically, the present invention relates to a sliding device including a pair of sliding tracks each including a lower rail and an upper rail, the rails have an improved design, can have improved stability, and the upper rails When sliding against the lower rails, it is possible to reduce the effort of sliding movement.

Vehicle seats generally have a sliding function to push or pull the seat cushion forward or rearward, a height adjustment function to adjust the height of the seat cushion, and a reclining function to adjust the inclination of the seat back relative to the seat cushion. .

The sliding function is generally implemented by a sliding device including a pair of parallel tracks, each track including a lower rail attached to the vehicle floor and an upper rail attached to the vehicle seat, the upper rail being a lower Constrained to the rail, but can slide relative to the lower rail.

Each track of the sliding device further comprises a latch for allowing/preventing movement of the upper rail relative to the lower rail. In the locked position where the latch is normally located, the latch prevents the upper rail from sliding against the lower rail, thereby avoiding accidental displacement of the seat relative to the vehicle floor. The sliding device further has a release member that can be used by the user to move the latch of the track to the unlocked position, and in the unlocked position, the upper rail freely moves relative to the lower rail to seat the vehicle floor. The position of can be adjusted. The release member may be manufactured as a handle in the shape of a "U" with two arms substantially parallel, and the end portions of the handle simultaneously act on the respective latches of the track of the sliding device to allow the latch Move them to the unlocked position.

The sliding device is disclosed, for example, in patent application EP 752 338.

In order to constrain the upper rail to each lower rail, in a known sliding device, the lower rail has an upwardly oriented "U"-shaped cross section and the upper rail has a downwardly arranged "U"-shaped cross-section. And the upper and lower rails have respective flanges that work together to constrain the upper rail to the lower rail.

In order to allow and improve the sliding motion of the upper rail with respect to the lower rail, balls are provided between the upper rail and the lower rail, the rails having a shape forming a guide portion for the ball.

Patent applications US 2015/0291062, US 2018/0257515, US 2018/0222352, US 2007/0069099 and JP 2018-043717 all disclose a sliding device having the above structure.

However, the sliding device disclosed in the above document is not free from disadvantages.

More specifically, the design of the lower and upper rails within the sliding device is not optimized with respect to the stability of the rail coupling and the effort during the sliding motion of the upper rail with respect to the lower rail.

Accordingly, the main object of the present invention is to provide a sliding device having a sliding track including a lower rail and an upper rail having an improved design, thereby improving the stability of the sliding device and reducing the sliding effort.

Another object of the present invention is to provide a sliding device having a compact and cost-effective configuration.

The above and other objects are achieved by means of a sliding device as claimed in the appended claims.

Summary of the invention

According to a first feature of the present invention, the sliding device includes a lower rail, an upper rail slidably constrained to the lower rail, and a latch for selectively allowing/preventing movement of the upper rail with respect to the lower rail. Containing a pair of parallel tracks, each lower rail has a cross section with a "U" shape facing upwards, ends with a lower wall and flanges bent toward the inner and lower sides, respectively, and a pair of parallel verticals facing upwards. Including walls, each upper rail having a cross-section with a “U” shape facing downward and ending with an upper wall and flanges bent toward the outer and upper sides respectively, and including a pair of vertical walls facing downward and parallel, The flanges bent toward the outer side and the upper side of the upper rail are coupled with the flanges bent toward the inner side and the lower side of the lower rail, and the lower ball guide portion and the upper ball guide portion at each side of the lower rail and the upper rail. It is formed by rails, and the lower ball guide portion is formed by the first lower ball guide portion formed by the lower rail at a bent portion connecting the lower wall to a vertical wall facing upward, respectively, and toward the outside and the upper side of the upper rail. It is formed by a second lower ball guide portion formed by a bent flange, and the upper ball guide portion is formed by the lower rail at a bent portion connecting the vertical wall facing upward to the flanges bent toward the inner side and the lower side, respectively. It is formed by a first upper ball guide part and a second upper ball guide part formed by a flange bent toward the outer and upper sides of the upper rail.

According to the invention, flanges are formed that are bent toward the outer and upper sides of the upper rail such that the second lower ball guide portion comprises a straight section and a curved section, and the second upper ball guide portion also comprises a straight section and a curved section. do.

According to the invention, in normal operation, the balls inside the lower ball guide are in contact with the second lower ball guide in a straight section, while the balls are spaced apart from the curved section of the second lower ball guide and Similarly, the balls inside the upper ball guide are in contact with the second upper ball guide part in a straight section, while the balls are spaced apart from the curved section of the second upper ball guide part.

According to the design of the present invention, the second lower ball guide portion contacts the ball received in the lower ball guide in a tangential direction, and the second upper ball guide portion contacts the ball received in the upper ball guide in the tangential direction.

Therefore, the contact area between the second lower ball guide portion and the second upper ball guide portion and each of the balls is minimized to reduce friction, and as a result, the effort during sliding of the upper rail with respect to the lower rail is reduced.

When a load is applied, the upper and lower rails are pressed against each other and slightly elastically deformed so that the curved section of the second lower ball guide portion contacts the ball received in the lower ball guide portion and The curved section contacts the ball received within the upper ball guide.

When the curved sections of the second lower ball guide portion and the second upper ball guide portion contact each ball, further deformation of the rail is prevented.

According to a preferred embodiment of the present invention, the straight section of the second lower ball guide part is located above the curved section of the second lower ball guide part, and the straight section of the second upper ball guide part is the second It is located below the curved section of the upper ball guide part.

According to a preferred embodiment of the present invention, the radius of curvature (that is, the radius of curvature of the first lower ball guide portion) at the bent portion of the lower rail connecting the lower wall to each vertical wall facing upward is within the lower ball guide portion. It is substantially the same as the radius of the received ball, and the radius of curvature of the curved section of the second lower ball guide portion is greater than the radius of the ball. Similarly, the radius of curvature (i.e., the radius of curvature of the first upper ball guide portion) at the bend of the lower rail connecting the vertical wall facing upward to the respective inward and downwardly curved flanges is received within the lower ball guide. It is substantially the same as the radius of the ball, and the radius of curvature of the curved section of the second upper ball guide portion is greater than the radius of the ball.

According to a preferred embodiment of the present invention, the straight section of the second lower ball guide part is selected to keep the balls received in the lower ball guide part together with the vertical wall of the lower rail in an optimal position and to absorb possible dimensional changes. Arranged to form an angle. Similarly, the straight section of the second upper ball guide portion is arranged with the vertical wall of the lower rail to form a selected angle to maintain the balls received in the upper ball guide in an optimal position and to absorb possible dimensional changes.

According to a second feature of the invention, a ball stop element is provided to limit the motion of the ball along the lower and upper ball guides.

According to the invention, a first ball stop element for each ball guide is provided by bending the lower rail wall inward at the first lower/upper ball guide at selected positions along the longitudinal axis of the lower rail.

According to the invention, a second ball stop element for each ball guide is formed by providing a tab protruding from the upper rail toward the center of each ball guide in the second lower/upper ball guide portion.

Advantageously, the first and second ball stop elements of the present invention are manufactured with ease and low cost, and the manufacture of the ball stop elements does not require the use of complicated tools and large tolerances are allowed.

According to a third feature of the present invention, an end stop is provided for limiting the relative motion of the upper rail with respect to each of the lower rails.

According to the invention, a first end stop on each side of the lower and upper rail is provided by cutting and bending the first flap from the wall of the lower rail, and the second end stop is provided by the second end stop from the wall of the upper rail. Provided by cutting and bending of the flap, the first and second end stops are arranged so that the first and second end stops are in contact with each other and prevent further movement of the upper rail with respect to the respective lower rail.

Advantageously, according to the invention, the first and second end stops are formed as flaps in the shape of a trumpet (i.e., the first and second end stops have a trapezoidal shape, with a longer base from each rail wall). Have).

The flared shape of the first and second end stops ensures a complete bond between the first and second end stops, providing a very strong bond.

According to a fourth feature of the present invention, a reinforcing block is mounted in an opening facing the lower side of each upper rail to prevent bowing and peeling of the upper rail, and the reinforcing block is precisely attached to each upper rail. In order to securely assemble, the vertical walls facing the lower side of the upper rail have one or more corresponding inwardly protruding lugs.

Preferably, each of the upper rail and the reinforcing block can be easily assembled by the lugs.

Other features and advantages of the present invention will become apparent from the detailed description of the preferred embodiments given by way of example not limiting the present invention with reference to the accompanying drawings.
1a is a perspective view of a sliding device according to the invention.
Figure 1b is an exploded view of the sliding device shown in Figure 1a.
Fig. 2a is a cross-sectional view of the sliding device of Fig. 1a in a first longitudinal position;
2B is an enlarged view of detail B2 of FIG. 2A.
Fig. 3a is a cross-sectional view of the sliding device of Fig. 1a in a second longitudinal position;
3B is an enlarged view of detail B3 of FIG. 3A.
Figure 4a is a perspective view showing a portion of the track of the sliding device of Figure 1a.
4B is an enlarged view of detail B4 of FIG. 4A.
Fig. 4c shows an end stop provided on the lower rail of the sliding track of Fig. 4a;
Fig. 4d shows an end stop provided on the upper rail of the sliding track of Fig. 4a;
Fig. 5a is a perspective view showing a portion of the track of the sliding device of Fig. 1a showing a reinforcing block;
Figure 5b is a cross-sectional view showing a portion of the track of Figure 5a.

1A and 1B, a sliding device 100 according to the present invention is schematically shown.

According to a technique known per se, the sliding device 100 includes a lower rail 20 attached to the vehicle floor and an upper rail 30 attached to the frame of the vehicle seat (for example, by a screw-structure fastener 40). ), including a pair of parallel tracks 10.

As will be disclosed in detail in the following description, each upper rail 30 is constrained to each lower rail 20 but can slide relative to the lower rail.

In order to selectively allow/prevent relative sliding movement between the upper and lower rails, each track 10 has a latch 50 between the lower and upper rails and the latches are received within the track. In a normal state, the latch 50 is in a locked position, and in the locked position, the latches prevent the upper rail from sliding against the lower rail.

The sliding device 100 further includes an releasing member 60 arranged to drive the latch 50 to the unlocked position so that the user can adjust the position of the seat relative to the vehicle floor, the unlocking position In the latches allow the upper ray to slide against the lower rail. In the illustrated embodiment, the release member is formed as a “U”-shaped release handle 60 comprising an intermediate gripping portion 62 and two arms 64 that are substantially parallel, the end of the release handle being It is arranged to drive each latch 50 to the unlocked position.

As better shown in Fig. 2A, each lower rail 20 has a transverse cross-section with an upwardly facing "U" shape and has a lower wall 22 and a pair of vertical walls 24 facing upwards and parallel. ), and the vertical wall comprises flanges 26 bent inward and downward. That is, each flange 26 of the lower rail 20 is located away from the upper end of the vertical wall 24 facing upward and from the first portion 26a facing inward and the first portion 26a facing inward. It has a second portion 26b extending and facing downwards.

Correspondingly, each upper rail 30 has a transverse cross section with a "U" shape facing downwards and ends with respective flanges 36 facing outward and facing upwards, and a pair of vertical walls facing downwards and parallel ( 34).

The flanges 36 bent outward and upward of the upper rail 30 are coupled under the flanges 26 bent inward and downward of each lower rail 20 to restrain the upper rail with respect to the lower rail, and the Allows sliding movement of the upper rail relative to the lower rail.

In order to improve this sliding motion, a ball 70 is arranged between the lower rail and the upper rail.

To this end, a lower ball guide part 72 and an upper ball guide part 74 are formed at each side of the rail by the lower and upper rails as follows.

-The lower ball guide part 72 is formed of the first lower ball guide part 72a formed by the lower rail and the upper rail at the bent part connecting the lower wall 22 to each of the vertical walls 24 facing upward. It is formed by a second lower ball guide portion 72b formed by a flange 36 bent outward and upwardly.

-The upper ball guide part 74 is a first upper ball guide part 74a formed by the lower rail at the bent part connecting the vertical wall 24 facing upward to the flange 26 bent toward the inner and lower sides, respectively. And a second upper ball guide portion 74b formed by a flange 36 bent toward the outer and upper sides of the upper rail.

As better shown in Fig. 2b, according to the invention the second lower ball guide part 72b comprises a straight section 76a and a curved section 76b and the second upper ball guide part 74b is Further, a flange 36 is formed that is bent toward the outside and upwards of the upper rail 30 to include a straight section 78a and a curved section 78b.

In normal operation, the balls 70 inside the lower ball guide 72 only contact the second lower ball guide part 72b in the straight section 76a, while the balls are in contact with the second lower ball guide part. It is spaced apart from the curved section 76b of 72b. Similarly, the balls inside the upper ball guide 74 only contact the second upper ball guide part 74b in the straight section 78a, while the balls are It is spaced apart from the curved section 78b.

As a result, the contact area between the second lower/upper ball guide portions 72b and 74b and each of the balls 70 is minimized to reduce friction, and thus the sliding of the upper rail 30 with respect to the lower rail 20 Minimize the effort in the exercise process.

When a weight load is applied, the upper and lower rails are pressed against each other and slightly elastically deformed, so that the curved section 76b of the second lower ball guide portion 72b is the balls received in the lower ball guide 72 And the curved section 78b of the second upper ball guide portion 74b contacts the ball received in the upper ball guide portion 74.

When the curved sections 76b, 78b of the second lower/upper ball guide portions 72b, 74b contact each of the balls 70, further deformation of the rail is prevented, thereby ensuring high structural stability.

According to the illustrated embodiment of the present invention, the straight section 76a of the second lower ball guide part 72b is located above the curved section 76b of the second lower ball guide part and the second upper ball guide part 74b The straight section 78a of is located below the curved section 78b of the second upper ball guide part.

According to a preferred embodiment of the present invention, the radius of curvature of the first lower ball guide portion 72a is substantially the same as the radius of the balls 70 accommodated in the lower ball guide portion 72, and the second lower ball guide portion ( The radius of curvature of the curved section 76b of 72b) is larger than the radius of the ball.

Similarly, the radius of curvature of the first upper ball guide portion 74a is substantially the same as the radius of the balls 70 accommodated in the upper ball guide portion 74, and the curved section of the second upper ball guide portion 74b The radius of curvature of (78b) is larger than the radius of the balls.

In this regard, the balls accommodated in the lower ball guide 72 may have a radius different from the radius of the ball accommodated in the upper ball guide 74 or, optionally, the balls 70 may have the same radius.

By means of the flange 26 of the lower rail 20, i.e. the first inward facing portion 26a of the flange, the angle selected to keep the balls received in the lower ball guide in an optimal position and to absorb possible dimensional changes. It is preferred that the straight section 76a of the second lower ball guide portion 72b is arranged to form. Similarly, by means of the flange 26 of the lower rail 20, i.e. the first inward facing portion 26a of the flange, to keep the balls received in the upper ball guide in an optimal position and to absorb possible dimensional changes. A straight section 78a of the second upper ball guide portion is arranged to form a selected angle. The angles may be the same or different from each other. In the illustrated embodiment, the angles are substantially equal to each other and are selected within the range of 20° to 40°.

As shown in FIGS. 3A and 3B, ball stop elements 82a, 82b, 84a, 84b are provided to limit the motion of the ball along the respective ball guides 72,74.

According to the invention, the first ball stop element 82a for each lower ball guide 72 is at selected positions along the longitudinal axis of the lower rail at the lower rail wall at the first lower ball guide portion 72a. It is provided by bending it inward. Similarly, a first ball stop element 84a for each of the upper ball guides 74 is inside the lower rail wall at the first upper ball guide portion 74a at selected positions along the longitudinal axis of the lower rail. It is provided by bending it.

Further, according to the invention, the second ball stop element for each lower ball guide 72 is from the upper rail wall of the second lower ball guide part 72b at selected positions along the longitudinal axis of the upper rail. It is formed by providing a tab 82b protruding toward the center of the lower ball guide 72. To this end, one or more grooves 86 are cut into the upper rail wall of the second lower ball guide portion 72b at selected positions along the longitudinal axis of the upper rail, and one or more tabs 82b are cut into the upper rail wall. It is inserted into the groove and protrudes toward the center of the lower ball guide 72. Similarly, the second ball stop element for each upper ball guide 74 is the upper ball guide from the upper rail wall of the second upper ball guide part 74b at selected positions along the longitudinal axis of the upper rail. It is formed by providing a tab 84b protruding toward the center of (74). To this end, one or more grooves 86 are cut into the upper rail wall of the second upper ball guide portion 74b at selected positions along the longitudinal axis of the upper rail, and one or more tabs 84b are inserted into the groove. And protrudes toward the center of the upper ball guide 74.

Advantageously, the ball stop elements 82a, 82b, 84a, 84b of the sliding device according to the present invention have a simple structure and can be manufactured in an easy and low cost process and no excessive tolerances are required.

As described above, each of the upper rails 30 is constrained to each of the lower rails 20, but the upper rails may slide with respect to the lower rails. However, in order to prevent the upper rails from being separated from each lower rail, the sliding motion must be limited in the longitudinal direction.

To this end, end stops 92 and 94 are provided for limiting the relative motion of the upper rail 30 with respect to each lower rail 20, as shown in FIGS. 4A and 4B.

Specifically, the first end stop 92 on each side of the lower and upper rail is provided by cutting and bending the first flap 92 from the wall of the lower rail, and the second end stop 94 is Provided by cutting and bending the second flap 94 from the wall of the upper rail, the first and second end stops 92 and 94 contact each other and prevent further movement of the upper rail with respect to the respective lower rail The first and second end stops are arranged so as to be.

According to the invention, as better shown in Figs. 4c and 4d, the first and second end stops are formed as flared flaps 92, 94, that is, the flaps have a trapezoidal shape and are slightly It has a longer base (92b, 94b) off the rail wall with tilted and actuating sides (92a, 94a).

The flared shape of the first and second end stops 92, 94 advantageously ensures a positive engagement between the first and second end stops, providing a very strong bond.

Referring now to FIGS. 5A and 5B, another advantageous feature of the design of the lower and upper rails of the sliding device 100 according to the present invention is shown.

The reinforcing block 110 shown in FIGS. 5A and 5B is to prevent bowing and peeling of the upper rail and sheet collapse in a state of high impact load (vertical wall facing the lower side of the upper rail) It is mounted according to a known technique in an opening facing the lower side of the upper rail 30 (between 34).

According to the present invention, in order to accurately and firmly fix the reinforcing blocks 110 to each of the upper rails 30, the vertical walls 34 facing the lower side of the upper rails 30 are formed in the longitudinal direction of the upper rails. It has one or more lugs 112 and 114 correspondingly projecting inwardly at a selected location along the axis.

In the illustrated embodiment, each vertical wall 34a of the upper rail 30 has a lower lug 112 and an upper lug 114.

The reinforcing blocks 110 can be easily assembled to each upper rail by means of the lower lugs 112 facing each other on the vertical wall 34 of the upper rail 30. The position of the reinforcing block can be accurately set and possible transverse movement can be prevented by the upper lugs 114 facing the vertical wall 34 of the upper rail 30.

The above description of the preferred embodiments of the present invention is given by way of example only, and various modifications and modifications by those skilled in the art may be implemented within the scope of the present invention as defined by the appended claims.

Claims (10)

A sliding device 100 for a vehicle seat, wherein the sliding device includes a lower rail 20 and an upper rail 30 slidably constrained to the lower rail 20, respectively, and each of the lower rails 20 Comprises a pair of vertical walls 24 facing upward, having a cross-section with an upwardly facing “U” shape and ending with a lower wall 22 and a flange 26 bent toward the inner and lower sides, respectively, and facing upward, Each upper rail 30 has a cross section with a "U" shape facing downward and ends with an upper wall 32 and a flange 36 bent toward the outer and upper sides, respectively, and a pair of parallel vertical walls facing downward. 34, wherein the flange 36 bent toward the outer side and the upper side of the upper rail 30 is coupled under the flange 26 bent toward the inner side and the lower side of the lower rail 20, and the lower rail Balls 70 are arranged between the upper rail and the lower ball guide 72 and the upper ball guide 74 for the balls at each side of the lower rail 20 and the upper rail 30. It is formed by lower and upper rails, and the lower ball guide part 72 is formed by the lower rail at a bent part connecting the lower wall 22 to a vertical wall 24 facing upward, respectively. It is formed by a lower ball guide portion 72a and a second lower ball guide portion 72b formed by a flange 36 that is bent toward the outer and upper sides of the upper rail, and the upper ball guide portion 74 is formed by the inner side and the upper side, respectively. The first upper ball guide portion 74a formed by the lower rail at the bend connecting the vertical wall 24 facing the upper side to the flange 26 bent toward the lower side, and toward the outside and the upper side of the upper rail In the sliding device for a vehicle seat formed by a second upper ball guide portion 74b formed by a bent flange 36,
The second lower ball guide portion 72b comprises a straight section 76a and a curved section 76b, and in normal operation, the balls 70 inside the lower ball guide 72 are only a straight section 76a ) In contact with the second lower ball guide portion 72b, while the balls are spaced apart from the curved section 76b of the second lower ball guide portion, and the second upper ball guide portion 74b is also It comprises a straight section 78a and a curved section 78b, and in normal operation, the balls 70 inside the upper ball guide 74 are only with the second upper ball guide part 74b in the straight section 78a. A sliding device for a vehicle seat, characterized in that while in contact, the balls are spaced apart from the curved section (78b) of the second upper ball guide portion (74b). The method according to claim 1, wherein the straight section (76a) of the second lower ball guide part (72b) is located above the curved section (76b) of the second lower ball guide part, and the second upper ball guide part (74b) A sliding device for a vehicle seat, characterized in that the straight section (78a) of) is located below the curved section (78b) of the second upper ball guide part. The method according to claim 1 or 2, wherein the radius of curvature of the first lower ball guide part (72a) is the same as the radius of the ball (70) accommodated in the lower ball guide part (72), and the second lower ball guide The radius of curvature of the curved section 76b of the portion 72b is larger than the radius of the ball, and the radius of curvature of the first upper ball guide portion 74a is the ball 70 accommodated in the upper ball guide 74 And a radius of curvature of the curved section (78b) of the second upper ball guide portion (74b) is greater than a radius of the ball.
2. A vehicle seat according to claim 1, characterized in that a ball stop element (82a, 82b, 84a, 84b) is provided to limit the movement of the ball along the lower and upper ball guides (72, 74). Sliding device.
The lower rail according to claim 4, wherein the first ball stop element (82a) for each lower ball guide (72) is at selected positions along the longitudinal axis of the lower rail. The feature provided by bending the wall inward and/or the second ball stop element 84a for each upper ball guide is lower in the first upper ball guide part 74a at selected positions along the longitudinal axis of the lower rail. A sliding device for a vehicle seat having a feature provided by bending a rail wall inward. The center of the lower ball guide according to claim 4, wherein the second ball stop element (82b) for each lower ball guide is at selected positions along the longitudinal axis of the upper rail from the upper rail wall of the second lower ball guide. A second ball stop element 84b for each upper ball guide and/or a feature formed by providing a tab protruding toward the second upper ball guide portion 74b at selected positions along the longitudinal axis of the upper rail. ) A sliding device for a vehicle seat having a feature formed by providing a tab protruding toward the center of the upper ball guide from the upper rail wall of the).
A vehicle according to claim 1, characterized in that first and second end stops (92, 94) are provided for limiting the relative motion of the upper rail (30) with respect to each of the lower rails (20). Sliding device for seats.
8. The method of claim 7, wherein on each side of the lower and upper rails a first end stop (92) is provided by cutting and bending a first flap from the wall of the lower rail, and a second end stop (94). ) Is provided by cutting and bending the second flap from the wall of the upper rail, so that the first and second end stops 92 and 94 contact each other and prevent further movement of the upper rail relative to each lower rail. A sliding device for a vehicle seat, characterized in that the first and second end stops are arranged.
6. The center of the lower ball guide according to claim 5, wherein the second ball stop element (82b) for each lower ball guide is at selected positions along the longitudinal axis of the upper rail from the upper rail wall of the second lower ball guide. A second ball stop element 84b for each upper ball guide and/or a feature formed by providing a tab protruding toward the second upper ball guide portion 74b at selected positions along the longitudinal axis of the upper rail. ) A sliding device for a vehicle seat having a feature formed by providing a tab protruding toward the center of the upper ball guide from the upper rail wall of the).
The method according to claim 1, wherein a reinforcing block (110) is mounted between vertical walls (34) facing the lower side of the upper rail, and the upper part is used to assemble the reinforcing block (110) to each of the upper rails (30). A sliding device for a vehicle seat, characterized in that it has at least one lugs (112, 114) protruding toward the inside correspondingly at a selected position along the longitudinal axis of the rail.

Images